<template>
    <div>
        <button @click="isShow = true">点我弹个窗</button>
        <teleport to="body">
            <div v-if="isShow" class="mask">
                <div class="dialog">
                <h3>我是一个弹窗</h3>
                <h4>一些内容</h4>
                <h4>一些内容</h4>
                <h4>一些内容</h4>
                <button @click="isShow = false">关闭弹窗</button>
            </div>
            </div>
        </teleport>
    </div>
</template>

<script>
import { ref } from 'vue';

export default {
    name: 'Dialog',
    setup() {
        let isShow = ref(false)

        return {
            isShow
        }
    }
};
</script>

<style scoped>
.mask {
    position: absolute;
    top: 0;bottom: 0;left: 0;right: 0;
    background-color: rgba(0, 0, 0, 0.5);
}
.dialog {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    width: 300px;
    height: 300px;
    background-color: green;
}
</style>